Having an ego-death experience is not necessarily religious, it has religious implications i.e. it raises questions that may very well lead someone to question more parts about their life and about reality and nature than they previously questioned.
That might seem like a trivial and subtle difference, while it is kind of subtle it is also an important difference.
I personally don't think the connotations and jumping to conclusions from rebirth experiences are in place, I am not asking anyone to believe that there is anything true or real about such an experience (I wouldn't really know what that would mean anyway!), just that it feels as if though you die and then start living again, which is as it happens a pretty particular way to feel. To stop existing and start existing again. It is subjective and it can just be called a psychedelic effect for all I care.
Therefore there is nothing religious or supernatural about it and I don't see what the big deal is accepting that such effects exist.
On an overdose of cannabis it is quite typical apparently to feel as though you are dying. You can label that 'fear of dying' or when you have seen that effect progress beyond that stage it can also be called the sense of self falling apart, having continuity problems etc.
I think many connotations Ismene is rejecting are put there by himself or maybe others than me in this discussion who I am not speaking for.
What I will say is that you probably don't understand a whole lot at all about something like Zen-Buddhism. It is not a belief-system but if practiced 'cleanly' more like a non-belief system. Yes there are rituals before and after one starts sitting to meditate but those are not meant to make you believe anything, they are rather meant to allow you to do things like drink tea without confusion or chaotic attention but predictability, calm and peace.
Whatever happens during meditation is left up to own interpretation, if there is even much to interpret. So I don't understand how that could be considered a belief system. Sometimes there are 'lessons' to be learned but the message from those is typically self-undermining and anti-authoritive: they are often meant to show that there are not fixed beliefs one should follow. So it is the opposite of many religions on that sense.
I will acknowledge that there are also ideas and beliefs existent in parts of Buddhistic teachings, but Zen tends to be kept clear of that.
I have been in retreat sessions where a lot of the time is spent meditating and I have felt many effects I have also had after having taking LSD. That is what I was saying earlier. The meditation can on the long term feel psychedelic, not the Buddhism.
I am a skeptical person and most of the things I am trying to show you exist are subjective effects: they are just things that seem to happen in the experience of people. So I don't think there are beliefs or belief systems I am forcing on you, and I don't think you are really in a position to reject anything of it since it was not presented as objective fact to begin with.
To a hammer, everything is a nail.
That would explain the cross...